Magna Limited

Charles M Blair, Jr

Charles A Stout

Raymond P Olsen

The method of recovering petroleum from a subterranean reservoir preferably comprising the steps of: (1) introducing through an injection well a predetermined amount of a polyalkylene oxide adduct of a fusible, aromatic hydrocarbon soluble synthetic resin which contains between about 4 to about 16 phenolic groups and is a condensate of a substituted phenol and an aldehyde, said condensate resin being further condensed with ethylene oxide and at least one other alkylene oxide containing 3 or 4 carbon atoms and in such amounts that the weight ratio of condensed alkylene oxide moiety to phenolic resin moiety ranges from about 1-to-1 to about 100-to-1 and the weight percentage of ethylene oxide residues to the total of all alkylene oxide residues ranges from about 20% to about 75%; said adduct (a) being soluble in water to the extent of about 1% or more at 25.degree. C. and (b) said 1% solution having a cloud point of less than about 70.degree. C.; (2) contacting said petroleum in said reservoir with an effective thin film forming amount of said polyalkylene oxide adduct; and (3) introducing into the formation an aqueous medium to urge said petroleum toward and through a producing well.

Oil recovery method utilizing highly oxyalklated phenolic resins

The invention relates to a method of breaking petroleum emulsions, by utilization of a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising: (a) from between about 5% and about 75% by weight of a polyether polyol; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

Method for breaking petroleum emulsions and the like using thin film

A method of recovering petroleum from a subterranean reservoir preferably comprising the steps of: (1) introducing through an injection well a predeterminable amount of a polyether polyol having the formula: ##STR1## wherein: A is an alkylene oxide group, --C.sub.i H.sub.2i O--;

Method of recovering petroleum from a subterranean reservoir

The method of recovering petroleum from a subterranean reservoir a polyepoxide condensate of at least one of: (a) a polyalkylene oxide adduct of a fusible, water-insoluble organic aromatic hydrocarbon solvent-soluble synthetic resin, wherein said resin has from between about 4 to about 15 phenolic groups and is an alkyl or cycloaliphatic substituted phenol-aldehyde condensate and (b) a polyether polyol including polyether amino polyols, said polyepoxide condensate at about 25.degree. C.: (i) being less than about 1% by volume soluble in water and in isooctane; (ii) having a solubility parameter in the range of between about 6.9 and about 8.5; and (iii) spreading at the interface between distilled water and refined mineral oil to form a film having a thickness no greater than about 20 Angstroms at a film pressure of about 16 dynes per cm.

The invention relates to the use of a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising polyepoxide condensates of resinous polyalkylene oxide adducts and polyether polyols for the breaking of petroleum emulsions, and the like, the micellar solution comprising: (a) from between about 5% and about 75% by weight of said polyepoxide condensate; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

Method for breaking petroleum emulsions and the like using micellar

The invention provides a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising: (a) from between about 5% and about 75% by weight of a polyether polyol; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

Micellar solutions of thin film spreading agents comprising a polyether

The invention provides a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising: (a) from between about 5% and about 75% by weight of an acylated polyether polyol; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

Micellar solutions of thin film spreading agents comprising an acylated

The invention provides a homogeneous, micellar solution of a water-insoluble thin film spreading agent comprising polyepoxide condensates of resinous polyalkylene oxide adducts and polyether polyols comprising: (a) from between about 5% and about 75% by weight of said polyepoxide condensate; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

Micellar solutions of thin film spreading agents comprising polyepoxide

The invention relates to the use of a homogeneous, micellar solution of a water-insoluble thin film spreading agent for the breaking of petroleum emulsions, and the like, comprising: (a) from between about 5% and about 75% by weight of an acylated polyether polyol; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

The method of recovering petroleum from a subterranean reservoir an acylated polyether polyol, the polyether polyol thereof being derived from the reaction of an alkylene oxide and a member selected from polyols, amines, polyamines and amino alcohols containing from about 2 to about 10 active hydrogens, said acylated polyether polyol being the reaction product of said polyether polyol and a member selected from the class consisting of mono- and polybasic carboxylic acids, acid anhydrides, and iso-, diiso-, and polyisocyanates, said acylated polyether polyol at about 25.degree. C.: (a) being less than about 1% by volume soluble in water and in isooctane; (b) having a solubility parameter in the range of between about 6.9 and about 8.5; and (c) spreading at the interface between distilled water and refined mineral oil to form a film having a thickness no greater than about 20 Angstroms at a spreading pressure of about 16 dynes per cm.

The invention provides a homogeneous, micellar solution of a water-insoluble thin film spreading agent, comprising: (a) from between about 5% and about 75% by weight of resinous polyalkylene oxide adducts; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

Micellar solutions of thin film spreading agents comprising resinous

The invention relates to a method of breaking petroleum emulsions by utilization of a micellar solution of a water-insoluble thin film spreading agent, comprising: (a) from between about 5% and about 75% by weight of resinous polyalkylene oxide adducts; (b) from between about 2% and about 30% by weight of a hydrotropic agent; (c) from between about 2% and about 30% by weight of an amphipathic agent; and (d) from between about 15% and about 90% by weight of water.

Method for breaking petroleum emulsions and the like comprising resinous

The method of recovering petroleum from a subterranean reservoir preferably comprising the steps of: (1) introducing through an injection well a predeterminable amount of a polyalkylene oxide adduct of a fusible, water-insoluble organic aromatic hydrocarbon solvent-soluble synthetic resin, wherein said resin has from between about 4 to about 15 phenolic groups and is an alkyl or cycloaliphatic substituted phenol-aldehyde condensate of an ortho- or para-substituted phenol and an aldehyde, said condensate resin being thereafter further condensed with an alkylene oxide containing less than about five carbon atoms in an amount equal to at least one mole of alkylene oxide per phenolic moiety of said resin, said condensation product at about 25.degree. C.: (a) being less than about 1% by volume soluble in water and in isooctane; (b) having a solubility parameter in the range of between about 6.9 and about 8.5; and (c) spreading at the interface between distilled water and refined mineral oil to form a film having a thickness no greater than about 20 Angstroms at a film pressure of about 16 dynes per cm, the weight ratio of oxide to condensation product in a solvent-free state being between about 1-to-10 and about 10-to-1; (2) contacting said petroleum in said reservoir with an effective thin film forming amount of said polyalkylene oxide adduct; (3) and introducing into the formation an aqueous injection medium to urge said petroleum toward and through a producing well.

The method of recovering petroleum from a subterranean reservoir preferably comprising the steps of: (1) introducing through an injection well a predeterminable amount of an acylated polyether polyol, the polyether polyol thereof having the formula: ##STR1## wherein: A is an alkylene oxide group, --C.sub.i H.sub.2i O--;

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Buena Park, CA, United States of America

Charles M Blair, Jr